Rubens Charles, known as Cobrinha, holds a 3-2 edge over Augusto Tanquinho Mendes across 5 recorded meetings. All 5 were contested in the gi, and they cluster in a tight window: their first bout came at the 2007 World Jiu-Jitsu IBJJF Championship, then a semi-final at the 2011 World Jiu-Jitsu IBJJF Championship, and three separate meetings across 2013. This was a featherweight rivalry between two of the division's best.

The scorecards tell the story of how these matches were decided. Four of the 5 went to points, with the exception being that first meeting in 2007, where Cobrinha closed it out by Gi Choke From Back. Mendes took the 2013 Abu Dhabi World Pro final and the 2011 Worlds semi-final, while Cobrinha answered with wins at the 2013 Pan Jiu-Jitsu IBJJF Championship and the 2013 IBJJF European Jiu-Jitsu Championships, both in the gi and both on points.

The broader profiles differ in one clear area. On record Cobrinha finishes at a high clip, with 53% of his wins coming by submission, and his most frequent finish is the gi choke from back with 20 wins. Mendes leans more on position, with 18% of his recorded wins by submission. Both are decorated: Mendes carries an ADCC World title from 2019 and an IBJJF World title from 2013, while Cobrinha holds five IBJJF World titles and three ADCC World titles.